tumble /ˈtʌmbəl/ star2 CET6 TEM4 (tumbling,tumbled,tumbles)

• 1.  

  V-I（不及物动词） If someone or something tumbles somewhere, they fall there with a rolling or bouncing movement. 摔倒

  例：

  A small boy tumbled off the porch.

  一个小男孩从门廊上摔了下去。

• 2.  

  N-COUNT（可数名词） Tumble is also a noun. 摔 [usu sing]

  例：

  He injured his ribs in a tumble from his horse.

  他从马上摔下来伤了肋骨。

• 3.  

  V-I（不及物动词） If prices or levels of something are tumbling, they are decreasing rapidly. (价格或水平) 暴跌 [journalism]

  例：

  Profit after taxes tumbled by half to $15.8 million.

  税后利润猛降了一半，跌到了1580万美元。

• 4.  

  N-COUNT（可数名词） Tumble is also a noun. (价格或水平的) 暴跌

  例：

  Oil prices took a tumble yesterday.

  石油价格昨天一阵暴跌。

• 5.  

  V-I（不及物动词） If water tumbles, it flows quickly over an uneven surface. (水流) 翻滚

  例：

  Waterfalls crash and tumble over rocks.

  瀑布在岩石上撞击翻滚。